Abstract
The n-alkanes are the major constituents of paraffin waxes, which adversely affect the cold flow properties of crude oils and their fractions (gel formation). The n-alkanes crystallize out from the solution as the temperature is lowered. The knowledge of the structure of crystals is essential to understand the gel formation behavior of crude oil. n-Paraffin concentrates were extracted from six Indian crude oils. One particular n-paraffin concentrate was fractionated into smaller fractions by distillation. The crystal structure of these n-paraffin concentrates were determined by X-ray diffraction and correlated with the distribution of the carbon number present in them. It was observed that the crystal structures of these n-paraffin concentrates is greatly influenced by the carbon number distribution and the presence of amorphous content.
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